In most of its ionic compounds, cobalt is either co(ii) or co(iii). one such compound, containing chloride ion and waters of hydration, was analyzed, and the following results were obtained. a 0.256-g sample of the compound was dissolved in water, and excess silver nitrate was added. the silver chloride was filtered, dried, and weighed, and it had a mass of 0.308 g. a second sample of 0.416 g of the compound was dissolved in water, and an excess of sodium hydroxide was added. the hydroxide salt was filtered and heated in a flame, forming cobalt(iii) oxide. the mass of the cobalt(iii) oxide formed was 0.145 g. what is the percent composition, by mass, of the compound?
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Chemistry, 21.06.2019 22:50
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Chemistry, 22.06.2019 13:00
16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.
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In most of its ionic compounds, cobalt is either co(ii) or co(iii). one such compound, containing ch...
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